/Engine/Plugins/Runtime/CommonUI/Source/CommonUI/Public/CommonUIRichTextData.h
Derive from this class for rich text data per game it is referenced in CommonUI Settings, found in project settings UI
[UCLASS](Programming/UnrealArchitecture/Reference/Classes#classdeclaration)(Abstract, Blueprintable, Meta=(Category="Common UI")) class UCommonUIRichTextData : public [UObject](API\Runtime\CoreUObject\UObject\UObject)